SAO PAULO Dec 7 (Reuters) - Brazilian federal prosecutors
presented formal charges against billionaire financier Andre
Esteves and Senator Delcídio do Amaral on Monday, accusing them
of obstructing a criminal investigation, according to a source
familiar with the matter.

Esteves, a founder and top shareholder of investment bank
BTG Pactual SA and Amaral, who is President Dilma
Rousseff's point man in the Senate, were arrested on Nov. 25 on
suspicion of obstructing the country's largest-ever corruption
investigation.
(Reporting by Eduardo Simoes; Editing by Sandra Maler)